Concentrating-table.



E. DEISTER.

CONCENTRATING TABLE.

APPLICATION FILED JUNE 26.1916.

L1 193%, Patented Jan. 2, 1917.

1 SHEETS-SHEET l.

A TTOH/VE V Patented Jan. 2, 1917.

7 SHEETS-SHEET 2.

A TTOR/VE Y E. DEISTER.

4CONCENTRATING TABLE. APPLICATION r|LED1uNE26.191e.

Patented .m1121911 TSHEETS-SHEET 3.

W/TNESSES:

BY i l ATTORNEY E. DEISTER. coNcENTRATlNG TABLE.

APPLICATION FILED JUNE 26,1916.

Patented Jan. 2, 1917.

E. DEISTER.

CONCENTRATING TABLE.

APPLICATION FILED JUNE 26,19l6.

Patented Jan. 2,1917.

TSHEETS-SHEET 5.

WITNESSES:

A TTRNE Y E. DEISTER.

CONCENTRATING TABLE.

APPLlcAnoN man Jun: 2s. 191e.

Patented J an, 2, 1917.

1 SHEETS-SHEET 6.

WIT/VESSES:

`E. DEISTER.

CONCENTRATING TABLE. APPLICATION FILED IuII26. 1916.

1,1534, Patented Jan.2,1917.

A 7 SHEETS-SHEET EMII DEISTEE, F FORT WAYNE, INDIANA, ASSIG-NO T0 DEIS'IER MACHINE COMPANY, i

l 0F FORT WAYNE, INDIANA,l A CORPORATION 0F INDIANA.

coNcEN'rnarINe-TABLE.

nausea.

Specification of Letters Patent.

Patented aan. a, iena.

Apputation fuga :une 2e, 191e. s rial 1m 105,839.

- and State of Indiana, a citizen ofthe United States, have invented or j discovered certain new and useful Improvements in Concentrating-Tables, -of which improvement the following is-a speciiication. y

The invention described herein relates to certain improvement in" concentrating tables and has for its object a construction whereby the rate of flow of the material-to be treated from the line ofl feed to the tailing discharge edge will be approximately inversely proportional to the percentage of the values contained in the material, the rate 'of flow being increased as the values move down out of the material flowing acrossthe top lo'r` the riiles.

rThe invention is hereinafter more fully described andclaimed. A

In the accompanying drawing forming a part of this specification, Figure l is a top,-

vplan view of a concentrating table embody ing the improvements described an'dclaimed herein; Fig. 2 is la .sectional view on a plane Y.

indicated by theline II-IL Fig. 1; Fig. 3 is a sectionalp view .on a plane indicated by the line lll-llLFig. 1. 4Figslll, 5, 6 and 7 are views similar to Fig.,3 showing certain modifications of the improvement; Figs. 8,

10, 12, 141 and 16 are top plan views'of ta# bles embodying modifications of the .con 4 structionshownin; Fig. 1, and Figs. 9, 11, p

'nearly all of the values will settle down onto 13, .1'5 and 17 are sectional views of the tables shown in Fi s."8, 10,"12`,`14 andl 16 'respeclj tively, the p anes of secton'beingparallel. with the direction of'movement of the table; Figs. 18 and 19 are transverse sectionson planes indicated by the lines XVIII-XVI and XIXe-XIX, Fig. 16, Fig.' .19 being an' enlarged'scale. '1

In the ractice-of the invention, the table isv forme 'with a plurality `of stratifyingl surfaces, or surfaces on which the values will settle down through the gangue. vThe i. y'first surface, z'. e., the surface onto which the pulp is directed by the Afeed box 1 is soinclined downwardly from the line, offeed that the' rate of flow of thematerial will be'.

suspension as the latter, while the material.

is passing over the irstvsurface, will have moved so far down through the stream that the subsidence of alarge percentage below the tops of the riiiles will not be prevented by the more rapid movement of the stream. This second inclined surface may extend to the tailings discharge edge or, if preferred, one or more additional surfaces each having a greater downward inclination than the preceding surface, may be used. y

1s well known, the diierential vibra! tions of the table will cause not only the values but also the sand, although in a lesser degree,` to move toward -the mineral discharge edge. As the sand overlies the minerals or values, it will be' aiiected by the more rapid flowof the material, and hencera. smaller percentage will :remain suciently;

long on the table to be discharged at the middling discharge edge.

Thus the provision of means whereby the table adjacent lto lthe line of feed, will insurethe discharge of a very large percen-- tagealong the lupptutportion of the mineral discharge edge, and l"reduce the percentage passing Aover the middling discharge edge to a very-low percentage, and the increased 'l rate ofmovement .of the material as the l valuesare eliminated, will reduce the percentage. of sand discharge at or adjacent to the middling discharge edge toa minimum. As shown in. Fig. 3the improvement may be embodied in a table by constructing it withl its surface curved transversely .of the direction of the vibration of the table, the' curvature being such that by proper adjustment, the rate of flow across the portion 2, along the upper edge of which the pulp is directed by the 'feed trough 1, may be slow.

substantially parallel with thedirection of movements of the table. For operation, the

table isso adjusted that the portion 2,'onto which the pulp is fed will be nearly horizontal, sov that the low of pulp over it= toward the tailing discharge edge 3 willbe at such a rate that a greater portion of the values will settle down onto the portion 2. It

has been found that by the timethe material j has flowed 'across the portion 2, a very large proportion of the values have settled down onto,or into close proximity to the surface of the portion 2,-and the material reaching fthe line of break consists very largely of `gangue,which should be removed from the path of the -oncoming material. This removal is eiiected by giving the portion 4 of.

thev table such a downward inclination, that the material will .have a more rapid movef ment toward the 'tailings -discharge edge.

lso

The downward-inclination of theportion 4 v should not be so great asto cause airate "of i:low'so rapid that there will not be` an em-v -cient gravity separation of values remain' ing in the material, while it is owing across the 1oortion4.y The portion 4 of' the v table may extend from the portion 2 to the i tailings .discharge edge 3, lwith uniform in- -of-the main'stratifying surface,whle Fig-.r6 Y shows the portionextending about half way,

clination, as shown in Figs. 5, 6, and 7,"but it has been found that by giving a portion 5 of the table adjacent to the discharge edge, a downward inclination greater than that of theportion 4, as shown in Fig. 4, there will be a substantial reduction. in the proportion of gangue discharged over the middlings discharge-'edge .6. By reasoniof the more rapidflow of the material across the portion' 5,v such material will be subjected for a shorter time to the vibrating motion ofthe table 'and Ahence a very small proportion of .the gammer will reach'the middling. discharge'edge 6. rlhe extent of the portion 2 from the line of feed toward the tailing. dis# lcharge'edge may be varied and will be" dei pendent upon thev character-'of the material f thevalu'es may be step 4by step, z". e., the

*valuesv may be raisedl a' certain distance to betreated. g

ln the construction shdwnin tand 6'.

the portion 2fforms` approximately one thirdl and in Fig; 5 it Ais shown extending about twothirds of the'widthofthe table. Y e

The' Howe-of material from'the line of feed to the tailings discharge-is. comparatively slowratrstybut is-incre'asedV as the values .are separated ,out by gravity and hence the Larnaca material moved along the portion 4 toward the mineral discharge edge, by the vibration of the table will carry withit a comparatively small amount of gangue.

' Thev retention ofthe material fed onto the table for such a length of time as will permit of a large proportion of the values settling down onto the'surface of. the table,

also affords opportunity for the movement of ,a large part of the materiahboth values kand 'gangue toward the mineral discharge edge. v`While the values will -move at- 'a higher rate than the gangue, alargefproportion, of the latter will necessarily partake of the same movement, and hence a,

large amount of .w shin'g water wouldbe required to prevent gangue from passing over` the mineraldischarge wereit'not for the interpositionof means for eecting a separation ofthe "values"` and -gangue, such means being adapted to permit the continued onward movement of the values to the mineral discharge'-zedgeaf;I and to .divert the' gangue toward the tailings e discharge edge. 1

In effecting fthisfjseparation of the values and gangue, itfis'preferred to employ means for causing r'the svalu'e's'. to move upwardly -mineral discharge edge 7. The plateau is .made ofsuch a `height above thel main or stratifying'l -surface of the table, that its. y'surface willbe levelor slightly above theA -surface of vthe-.material on the stratifying portion of thetable. .While the minerals are` moving up therincline theyV will be crowded together, l butv as soon as the minerals pass into'j'the plateau', their rate of movement will beaccelerated andthe particles will separate and spread overthe plateau thereby; facilitating the washing .away of particles of 'gangue by the water dlrected onto the plateau by the launder l0.

I :In lieu pf employing a single inclined surface and plateau for raising the values out of theA gangue, ysuch upward movement of through the gangue by an incline il onto a second' stratifying surface formed by a 'plateau-12, and moved 'entirely out of the gangue onto the washingplateau 9 by the incline 8, as shown'in Figs. 8 and 9. As in the construction'shown in Fig. land Fig. 2,

lthe plateau 9 isso constructed that its surface is level with or slightly higher thanl the surface of the material on the table-'while out of the-.gangue' and onto a surface free from gangue,` except such fine particles as lll@ the plateau 121s made f'1eseheight and: will be below the levelofthe material onthe table, and will serve as an auxiliary across they stratifying' surfaces. It is gener-- ally preferable to extend the rifiies'at least Y to the plateau which forms the washing surf ace, or if the ore is highly mineralized .the -rifiles may extend acrossthe washing plateau, suchextensions being made very shallow, as for` example in the matter-indicated in Figs. 16 to 19.

It will be observed the table forms a pool in whichthe material has'a slow movement, and consequently not only will the coarser particles move down onto thesurface. quite rapidly, but the finer vparticles will'settle out of the upper por-` tions of the material and down to such a the portion 4. Hence, although the inclination vof the portion 4 is greater, only thefsurlevel as to be'readily caught bythe riilieson faceportions of the material out of which values have settled, will have an increased rate. of flow, due to the greater inclination,

the under portions-'of the material containing the values being retarded. vbythe riifles;

. By reason of the Ycomparatively 4rapid flow of the surface portions of the materials across the portion .4, and its lower specific gravity, due to elimination fof vthe .values inthe pool, the vibratory motion of the table will have comparatively little effect thereon, and only a relatively small proportion'of'gangue willf be moved tothe line where thev first upward movement of Ithe values begins, and the values moving 'onto the first plateau I will beV comparatively free from gangue.

In lieu of employing a single incline and plateau, as in Figs. 1 and 2, or of raising the values to the washing surface by two inclines and an intermediate plateau, the upward movement may be effected ,by two inclined surfaces 14 and 15, ontoy a slightly inclined washing surfacel which extends vto the mineral discharge edge as shown in Figs. 1() and 11. In Figs. 12 andfl. is

A. 'shown a further modification of the values lifting means, the first upward movement of the values being effected by a short incline 17 which delivers lthe values onto 'a surface 18 having a smaller upward inclination than the incline 17 land. adapted to form a washing .surface extending tothe mlneral discharge edge.

In Flgs. 14 and 15, the surface 1 9 for vraising the values above the gangue 1s extended with a uniform inclination v'to the mineral discharge edge. As the washing the values.

water is directed onto the table adjacentvto the mineral Idischarge edge, they washing water will flowoppositetthe direction of the o movement of4 the values, and. hence" in the When treating ores rich in minerals, it is preferred to employ' V-shaped riies 13, as shown in Figs. 16, 17,18 and 19, and to ex tend the rifiles onto the washing upsurface 4and preferably. to the mineral `discharge edge.- As shown in'Fig. 17, the rifles `areso made that the apicesof the portions on the ythat'the portion 2 of of the tablefbut as the portions of the riiies extending across the washing up portion should project above the surface of thel lati ter, substantially less than the height of the apices of ribs on the main portion of the table above the surface of the latter, the tops ofthe ribs on the washing up surfacev4 'areplaned olf' as'shown in Fig. 19.' As for example, if the plateau forming the washing up surface in theform shown inFigs. 16 and 17, has its surface one-eighthof an inch above the main stratifying surface,'the rifiies overlying the latter surface would preferably be'made a 'quarter of an inch in height, and the portions ofthe rifiies'ovei`- lying the plateau, so thattheir upper edges' will be in a planecoincident with the apices of the rifiles on the main stratifying surface, and hence will have a'height of one-eighth of an inchabove lthe surface of `the plateau.

I claim herein as my invention: 1. A concentrating table having va portion ofI its surface extending from the line of feed approximately horlzontal and the succeeding portion extending toward the tailings discharge edge having a downward inclination relativeto the first portion in combination with riflies arranged substantially parallel with `the direction of vibration of the table and means arranged transversely of the rifiies for causing the values to move upwardly with reference to the material on the main stratifying surface.

2.v A concentrating table having port-ions ofits surface intermediate the line of feed and the tailings discharge edge at different inclinations relative to a horizontal plane,

theportion adjacent to/the'line of feed having less inclination than the portion adjacent to the tailin s dlscharge edge in combination with ri es arranged substantially parallel with the direction of vibration of the table and an upwardly inclined surface arranged transversely ofthe rifiiesvin the rear of the mineral discharge edge.

3. A transversely `inclined concentrating '13@ f table having portions of its surface inter-v mediate the line of feed and the tailings discharge edge at di'erent inclinations relaf` 'tive to a horizontal plane, the portion adstantially parallel with the direction of viedge.- l

bration of the table, a portion raised above lthe stratifying surface, the front edge of such ortion forming the mineral-discharge,

and its .rear edge bein downwardly inclined to the main strati ying surface.'

4. A transversely inclined concentrating table, (having portions of its surface, intermediate the line of feed and theV tailings discharge edge, at dierent inclinations, relative to a horizontal plane, the portion adjacent to the line of feed having less inclination than the portion adjacent to the tailings discharge edge, in combination with an upwardly inclined surface arranged along a diagonal line'relative to the line of Inovement of the table, said inclined surface extendingvalong the mineral discharge edge of the' table, and riiiies arranged on the table and extending toward the mineral discharge 5. A inclined concentrating table, having portions of the surface, intermediate the line of feed and the tailings vdischarge edge,'at dideren't' inclinations relative to a, horizontal plane,4

than the portion adjacent to the tailings discharge edge, the inclination from the feed side to the tailings discharge side successively increasing, in combination with an upwardly inclined portion arranged, along a diagonal line relative to the line of move ment of the table, said'inclined surface extending along the mineral discharge edge of the table, and rihies arranged on the table and extending toward the mineral discharge 6. A transversely inclined concentrating table, having portions ci its surface, intermediate the line of feed and the tailings discharge edge, at diderent inclinations, the

portion adjacent to the line of feed having less inclination than the portion adjacent to v the tailings discharge-edge, in combination with an upwardly inclined surface arranged along a 'diagonalline relative gto the line, of

movement of the' table,fsaid inclined surface* being co-extensive` with the mineral discharge edge ofthe table, andrimes arranged on the mainor stratitying surface, 'and terminating'along the diagonal line otseparation of mineral and gangue.

7.' A transversely inclined ,concentrating table, having portions of its surface, inter-1 mediate the line of feed and` the tailings-dis l charge edge, at did'erent inclinations relative to a horizontalplane the portion adjacent to the line of feedl havingless inclinadiderentially cvibrated, transversely- Larnaca tion than the portion adj acent to the tailings discharge edge, in combination with a plateau havmg an lnclined approach), said 1ntive to a horizontal plane, the portion adjacent to the line of feed having less inclination than the portion adjacent to the tailings discharge edge, /in combination with a plurality of plateaus each having an inclined approach, saidinclined approaches being arf ranged .along diagonal lines relative to the line of movement of the table, the upper plateau extending to the mineral discharge edge, and riliies arranged on the table extending toward the mineral discharge edge.

@KA transversely inclined concentrating table, having portionsA of its surface interlmediate the line of feed and the tailings discharge edge at an angle the one tothe other, the downward inclination of each portion being greater than that of the `preceding portion, in combination with a plateau having lan inclined approach, said inclined appreach being arranged along a diagonal line relative to the line of movement of the table,

the plateau extending along the mineral disu charge edge, and riiies arranged on the table aid extending toward the mineral discharge e ge .10; A transverselyinclined concentrating table, having portions of its surface, intermediate the line of feed and the tailings discharge edge at an angle the one lto the other, the downward inclination of each por-` tion being greater than that of the preceding portiomjin combination vwith a plurality ot plateaus each having an inclined approach, said inclined approaches `being arranged along diagonal lines relative to the line ci movement of the table, the upper plateau lill attending toward the mineral discharge edge, andriiiies arranged on the table and extending toward the mineral discharge v ge. l

' li.' A concentrating table having portions vvoiits surface, intermediate the line of feed N,

andthe tailings discharge edge at an angle thel one to the other, the downward inclinaot' vthe, preceding portion, in combination with a plateau having an inclined approach arranged along the mineral dischargel edge.V

, tion of each portion being greater than that are dit@

' tion relativel (to the first portiQn, in' combin'a.- the mineral discharge ed e.

`tion?wiilljav plateau h'syng inclined ap- Intestmony whereof have hereun't 10 lprpaLchfagrang-9ged alogthe n l'ianaialfdischange;I `my hand. v v DEISTER.

.edgfandfiimes waged* 'f'EmAmiE- Mobnmn: 

